西宁市天然林区林业有害生物发生情况调查及原因分析

Investigation of Pest in Native Forest Area of Xining City

采用野外踏查和标准地调查方法,查明西宁市天然林区主要林业有害生物有18种(虫害13种、病害4种、有害植物1种)。云杉叶锈病、云杉梢斑螟等依然是云杉天然林的主要林业有害生物种类;灰拟花尺蛾等威胁到白桦天然林的安全;落叶松-青杨锈病、落叶松叶蜂、落叶松球蚜等是天然林区落叶松人工林、杨树人工林的主要威胁。天然林区以叶部病虫害发生为主,钻蛀类害虫局部发生较重。

Field investigation and sample plots were applied to investigate pest in forest area of Xining.The result showed that there are 18 species of pest(pest insect 13 species,disease 4 species,and pest plant 1 species).Needle rust of spruce and Dioryctria schuezeella Fuchs are still dominant pest species in spruce forest.Larerannis orthogrammaria(Wehrli)is threat to birch forest.Melampsora larici-populina,Pristiphora erichsonii(Hartig)and Adelges laricis are threat to plantations of larix and poplar in native forest area.Native forests are often harmed by leaf pests in native forest area and partially by borer pest.